Britney Spears believed to be on cocktail of alcohol and drugs during DUI arrest: cops

Britney Spears was believed to be under the influence of a cocktail of drugs and alcohol during her DUI arrest on Wednesday night.

Officers detained the Princess of Pop on suspicion of driving under the influence of a combination of alcohol and drugs around 8:48 p.m. local time, the California Highway Patrol told Page Six Thursday.

We’re told she was pulled over after “driving erratically at a high rate of speed” while near the Borchard Road off-ramp in Newbury Park.

This story is developing …